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| Weber needle and seat valve recommendations https://ausmini.com/forums/viewtopic.php?f=2&t=91210 |
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| Author: | gtogreen1969 [ Sun Dec 06, 2015 3:15 pm ] |
| Post subject: | Weber needle and seat valve recommendations |
Re - Overfueling at high rpm's Chasing an over fuelling issue with a 1275 with 100hp using a 2.25 needle valve in a 45DCOE. I have read text on the subject and it says a 1.75 /2.0 needle and seat would be the one to use. Would running the slightly larger 2.25 needle valve cause an over rich condition / high float level? I understand the theory behind it - Just don't know at what size difference would cause this overfueling pulsing to occur. Just after some thoughts before I order a smaller needle valve. Cheers Brad |
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| Author: | drmini in aust [ Sun Dec 06, 2015 5:41 pm ] |
| Post subject: | Re: Weber needle and seat valve recommendations |
No, the bigger needle & seat will merely allow more fuel flow on a bigger motor. That said,it is pretty big- I run a 1.75 on the 1360's 45 Dellorto. |
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| Author: | gtogreen1969 [ Sun Dec 06, 2015 6:02 pm ] |
| Post subject: | Re: Weber needle and seat valve recommendations |
drmini in aust wrote: No, the bigger needle & seat will merely allow more fuel flow on a bigger motor. That said,it is pretty big- I run a 1.75 on the 1360's 45 Dellorto. Hi Doc I have a read a few things now for the pulsing rich mix theory. I will order a 1.75 Monday and see what happens. Page 64 of Des Hammills book talks about it but doesn't say how much larger will cause the richness. http://foxed.ca/rx7manual/manuals/carb_book.pdf |
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